"I think he'll do," he reported hesitantly to Armsworth. "A traumatic experience always leaves scars, but...." "But or no he'd better do," Armsworth said gruffly. "No wonder they ordered us out to pick him up! He was within fifty feet of the Aliens, and they didn't locate him! Dr. Norden, if that shield works and you can duplicate it, you'll be the most valuable man alive!" "And the tiredest and sleepiest," Norden suggested. His eyes narrowed, and his mind darted about, seeking some sign of the wrong reaction. Then he relaxed as the doctor and psychiatrist picked up their equipment and went out with advice he hardly heard. Armsworth lingered, and Norden searched about in his mind for what seemed to be a safe question. "How long until we reach Mars, general?" he asked. "We don't!" Armstrong's voice was suddenly thick and bitter. "We've abandoned Mars. The Aliens have moved inward. We--oh, hell, we'll reach our new laboratory on the Moon base in about four days! And you'd better start praying that shield works, or my value to you won't be worth salvaging." He shrugged abruptly and left, closing the cabin door quietly behind him. Norden slumped down on the bed, not bothering to remove his clothes. Automatically, he lifted his arms until both his hands were pressing against the nape of his neck, settled into a comfortable position against the automatic straps, and began reviewing all the events of his rescue carefully. And bit by bit, the worry in his head quieted. He'd gotten away with it. What "it" was, he didn't know or even remotely suspect, but the horrible tension was gone. II It was a short-lived respite, for no sooner had Norden reached the base on the Moon where the frenzied activity of the new laboratories went on than the tension returned. The taped interviews had been signaled ahead, together with Hardwick's notebooks and Norden's suggested list of equipment. Apparently, the information on him hadn't been satisfactory. He was rushed to a small, rectangular room where three men mumbled and complained unhappily as he was given tests that served no purpose that he could see. And finally, he was forced to wait in the corridor outside for nearly an hour while the three conferred, before he was given an envelope of papers and led to the office of General Miles, head of the entire Moon base. Miles skimmed through the reports and reached for the hushed phone. He was a man of indeterminate age, with a young voice and old eyes. There was a curious grace to his gaunt body, and a friendly smile on his rough-hewn face, despite telltale marks of exhaustion. Norden watched him tensely, but his reactions were not revealing until he turned back abruptly, and extended his hand.